573985921 has 4 divisors (see below), whose sum is σ = 589499092. Its totient is φ = 558472752.

The previous prime is 573985913. The next prime is 573985961. The reversal of 573985921 is 129589375.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 533841025 + 40144896 = 23105^2 + 6336^2 .

It is a cyclic number.

It is not a de Polignac number, because 573985921 - 2³ = 573985913 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (573985961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7756530 + ... + 7756603.

It is an arithmetic number, because the mean of its divisors is an integer number (147374773).

Almost surely, 2^573985921 is an apocalyptic number.

It is an amenable number.

573985921 is a deficient number, since it is larger than the sum of its proper divisors (15513171).

573985921 is a wasteful number, since it uses less digits than its factorization.

573985921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15513170.

The product of its digits is 680400, while the sum is 49.

The square root of 573985921 is about 23958.0032765671. The cubic root of 573985921 is about 831.0626158661.

The spelling of 573985921 in words is "five hundred seventy-three million, nine hundred eighty-five thousand, nine hundred twenty-one".